Rugged 21700 Battery Case

🔋 Rugged Dual 21700 Battery Case (2-Cell, Rugged Snap Fit)

This is a remix of the excellent “Rugged Box (Parametric)” by Whity on Printables.

I really liked the original design, but it wasn’t quite right for my 21700 batteries. So, I resized the exterior to perfectly fit two 21700 lithium-ion cells and made new inserts to hold them snug and secure.

• ⚙️ Fits 2 standard 21700 lithium-ion batteries
• 🧱 Durable, support-free design for easy printing
• 🔩 Requires 3x M3x30 screws to assemble (not print-in-place)

The result is a durable, support-free case ideal for EDC, flashlight kits, and portable power setups.

I designed it to be mainly military-olive with black accents, but I ended up printing it with black/orange as it's what I had on hand! I do recommend high-vis colors like orange/yellow for field use, or a military-style green with black screws for a more tactical vibe. Comment if you make it, I’d love to see it!